118 Karl M. Wiegand and Arthur J. Eames 



A sufficiently well-marked species, differing from the last-named in the looser 

 nodding inflorescence, the longer, browner, more lanceolate perigynia (2.5-3.5 mm. 

 long) which are flat or concave on the inner face, and the longer scales (3 mm. long) 

 which give the spikes a chaffy appearance. C. diandra has a strict bristly inflorescence, 

 with short (2 mm. long), less conspicuous scales, and with more evident perigynia, 

 2-2.5 mm. long, bright, dark-colored, and ovoid, with convex inner faces. 



19. C. decomposita Muhl. 



"Junius," Sartwell in Herb. (D.) ; not seen there since. 



N. Y. to Mich., southw. to Fla. and La. ; apparently absent on the Coastal Plain. 



20. C. Sartwellii Dewey. (C. disticha of Cayuga Fl.) 

 Marl bogs ; rare. June. 



"Junius" (Sartwell); Lowery Ponds (D. !) ; n. of Montezuma village. 

 Cent. N. Y. to B. C, southw. to Ohio, 111., Ark., Iowa, and Utah. 



21. C. chordorrhiza Ehrh. 



Peat bogs and boggy shores ; very rare. 



Junius ("Sartwell in C. U. Herb., also in Herb. Ham. Coll. and Cat. of 1844" D., 

 also Sarttvell in Gray Herb.) ; not found since. Reported from about nine other 

 stations in N. Y. State. 



Que. to B. C, southw. to Me., Vt., Pa., 111., and Iowa. Found also in Eurasia. 



Section 2. Hyparrhcnae 

 Subsection A. Elongatae 



22. C. Deweyana Schwein. 



Dry or damp woodlands, in humus, probably only in calcareous regions ; frequent. 

 June-July 15. 



Spencer; Newfield; n. of Enfield Falls; Six Mile Creek; McGowan Woods; s. 

 of Waterburg; e. of Ludlowville; s. e. corner of Dryden; Mud Creek, Freeville; 

 McLean Woods ; Black Brook, Tyre ; and elsewhere. 



Que. to B. C, southw. to Pa., Mich., Wis., and Ariz. ; rare or absent on the Atlantic 

 Coastal Plain. 



23. C. bromoides Schk. 



Swales and meadows about swamps, in more or less calcareous soils ; common. 

 June. 



Michigan Hollow Swamp (D. in C. U. Herb.) ; Fall Creek (F. C. Curtice in C. 

 U. Herb.) ; Indian Spring marsh; Freeville (D. in C. U. Herb.) ; Mud Creek, Free- 

 ville ; near Mud Pond, McLean Bogs ; near Ludlowville ; Howland Island ; and else- 

 where. 



N. S. to Ont. and Mich., southw. to Fla. and La. ; infrequent on the Coastal Plain. 



24. C. tenella Schk. 



Mossy marl bogs and springs ; frequent. May 20-June. 



Key Hill swamp; Michigan Hollow Swamp; South Hill Marsh; Caroline Depot 

 bog ; Ellis Hollow ; Fir Tree Swamp, Freeville ; Mud Creek, Freeville ; Beaver 

 Brook. 



Newf. to B. C, southw. to n. N. J., Pa., Mich., Colo., and Calif. ; rare or absent on 

 the Atlantic Coastal Plain. Found also in Eurasia. 



25. C. trisperma Dewey. 



Among shrubs in and around peat bogs ; frequent. June. 



Spruce Swamp, Enfield (D.) ; Freeville; Woodwardia Bog; Malloryville Bog; 

 McLean Bogs ; Junius peat bogs ; Duck Lake ; and elsewhere. 



